We found 21 dictionaries that define the word assertiveness:

General (15 matching dictionaries)

1. assertiveness: Merriam-Webster
2. assertiveness: Oxford Learner's Dictionaries
3. assertiveness: Collins English Dictionary
4. assertiveness: Vocabulary.com
5. Assertiveness, assertiveness: Wordnik
6. assertiveness: Cambridge Advanced Learner's Dictionary
7. assertiveness: Wiktionary
8. assertiveness: Dictionary.com
9. Assertiveness: Wikipedia, the Free Encyclopedia
10. assertiveness: Rhymezone
11. assertiveness: FreeDictionary.org
12. assertiveness: Mnemonic Dictionary
13. assertiveness: TheFreeDictionary.com

Business (1 matching dictionary)

14. assertiveness: Legal dictionary

Medicine (4 matching dictionaries)

15. Dorland's Illustrated Medical Dictionary (No longer online)
16. Medical Dictionary (No longer online)
17. online medical dictionary (No longer online)
18. assertiveness: Medical dictionary

Slang (1 matching dictionary)

19. Assertiveness: Urban Dictionary

(Note: See assertive as well.)

Definitions from Wiktionary (assertiveness) ▸ noun:  The quality of being assertive. Similar: self-assertiveness, assertability, nonassertiveness, assertibility, self-assuredness, strong personality, unassertiveness, aggressiveness, nonassertion, confidentness, more... Opposite: submissive, passive, docile, meek Phrases: assertiveness training, self assertiveness, more... Adjectives: new, greater, sexual, political, self, female, national, social, more, appropriate, individual Colors:     red,     orange,     gold,     crimson,     scarlet, more... ▸ Words similar to assertiveness ▸ Usage examples for assertiveness ▸ Idioms related to assertiveness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing assertiveness ▸ Words that often appear near assertiveness ▸ Rhymes of assertiveness ▸ Invented words related to assertiveness